package cn.com.easy.pay.weixinpay.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;

import javax.net.ssl.SSLContext;
import javax.xml.bind.JAXBException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContexts;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import cn.com.easy.exception.BusinessException;
import cn.com.easy.pay.weixinpay.config.WeixinPayConfig;
import cn.com.easy.utils.XmlUtils;

/**
 * User: rizenguo Date: 2014/10/29 Time: 14:36
 */
public class HttpsRequest {

	public interface ResultListener {

		public void onConnectionPoolTimeoutError();

	}

	// 连接超时时间，默认10秒
	private int socketTimeout = 10000;

	// 传输超时时间，默认30秒
	private int connectTimeout = 30000;

	// 请求器的配置
	private RequestConfig requestConfig;

	// HTTP请求器
	private CloseableHttpClient httpClient;

	public HttpsRequest(WeixinPayConfig weixinPayConfig) throws UnrecoverableKeyException, KeyManagementException, NoSuchAlgorithmException, KeyStoreException, IOException {
		init(weixinPayConfig);
	}

	private void init(WeixinPayConfig weixinPayConfig) throws IOException, KeyStoreException, UnrecoverableKeyException, NoSuchAlgorithmException, KeyManagementException {

		KeyStore keyStore = KeyStore.getInstance("PKCS12");
		FileInputStream instream = new FileInputStream(new File(weixinPayConfig.getCertLocalPath()));// 加载本地的证书进行https加密传输
		try {
			keyStore.load(instream, weixinPayConfig.getCertPassword().toCharArray());// 设置证书密码
		} catch (CertificateException e) {
			e.printStackTrace();
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} finally {
			instream.close();
		}

		// Trust own CA and all self-signed certs
		SSLContext sslcontext = SSLContexts.custom().loadKeyMaterial(keyStore, weixinPayConfig.getCertPassword().toCharArray()).build();
		// Allow TLSv1 protocol only
		SSLConnectionSocketFactory sslsf = new SSLConnectionSocketFactory(sslcontext, new String[] { "TLSv1" }, null,
				SSLConnectionSocketFactory.BROWSER_COMPATIBLE_HOSTNAME_VERIFIER);

		httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).build();

		// 根据默认超时限制初始化requestConfig
		requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();

	}

	/**
	 * 通过Https往API post xml数据
	 * 
	 * @param url
	 *            API地址
	 * @param xmlObj
	 *            要提交的XML数据对象
	 * @return API回包的实际数据
	 * @throws IOException
	 * @throws KeyStoreException
	 * @throws UnrecoverableKeyException
	 * @throws NoSuchAlgorithmException
	 * @throws KeyManagementException
	 * @throws BusinessException
	 * @throws JAXBException
	 */

	public String sendPost(String url, Object xmlObj) throws IOException, KeyStoreException, UnrecoverableKeyException, NoSuchAlgorithmException, KeyManagementException,
			JAXBException, BusinessException {
		String result = null;
		HttpPost httpPost = new HttpPost(url);
		// 将要提交给API的数据对象转换成XML格式数据Post给API
		String postDataXML = XmlUtils.objectToXml(xmlObj);
		// 得指明使用UTF-8编码，否则到API服务器XML的中文不能被成功识别
		StringEntity postEntity = new StringEntity(postDataXML, "UTF-8");
		httpPost.addHeader("Content-Type", "text/xml");
		httpPost.setEntity(postEntity);
		// 设置请求器的配置
		httpPost.setConfig(requestConfig);
		try {
			HttpResponse response = httpClient.execute(httpPost);
			HttpEntity entity = response.getEntity();
			result = EntityUtils.toString(entity, "UTF-8");
		} finally {
			httpPost.abort();
		}
		return result;
	}

	/**
	 * 设置连接超时时间
	 * 
	 * @param socketTimeout
	 *            连接时长，默认10秒
	 */
	public void setSocketTimeout(int socketTimeout) {
		this.socketTimeout = socketTimeout;
		resetRequestConfig();
	}

	/**
	 * 设置传输超时时间
	 * 
	 * @param connectTimeout
	 *            传输时长，默认30秒
	 */
	public void setConnectTimeout(int connectTimeout) {
		this.connectTimeout = connectTimeout;
		resetRequestConfig();
	}

	private void resetRequestConfig() {
		requestConfig = RequestConfig.custom().setSocketTimeout(socketTimeout).setConnectTimeout(connectTimeout).build();
	}

	/**
	 * 允许商户自己做更高级更复杂的请求器配置
	 * 
	 * @param requestConfig
	 *            设置HttpsRequest的请求器配置
	 */
	public void setRequestConfig(RequestConfig requestConfig) {
		this.requestConfig = requestConfig;
	}
}
